They first recorded under the alias Grey C. Frost for a long time but since 2002, they call themselves Grey & Frost, so that is not some kind of typo.
Grey & Frost were also (co-)producers for Talla 2XLC and André Visior.
ALBUMS
Grey & Frost Meets DJ X-Sonic
What Is Your Pleasure
2004, 12", Torpedo Records
Intermission Feat. Grey+Frost*
Piece Of My Heart
2003, 
,
, Trance/Progressive Trance
DJ Dean
Tunnel Trance Force America
2005, CD, Comp, Mixed, Water Music Dance, 
,
, Trance/Hard Trance
Various
Dream Club Vol. 11
2004, 2xCD, Comp, Dance Network
Voi
Journey To Paradise
2004
Various
Mega Trance 完全迷幻
2004
Talla 2XLC feat. Ely*
The Air That I Breathe
2004, ,
, Trance/Hard Trance
André Visior
Angels
2004, ,
, Hard Trance/Trance
Talla 2XLC
Tranceology
2004
Hypetraxx
Dark Trance Part 5
2003, 2xCD, Copy Prot., Mixed, Edel Records, Overdose, Club Tools, ,
, Trance/Hard Trance/Progressive House
Trinity
Everytime We Touch
2003
Talla 2XLC
Innocence
2003, ,
, Trance/Hard Trance/House
TGAF
Revolution
2003
DJ Tatana
Energy 02 - 10 Years - A Decade In Dance
2002, CD, Comp, Mixed, Energetic Records, Warner Music, 
,
, Trance
Trance Allstars
Synergy II - The Story Continues
2002
Talla 2XLC
Can You Feel The Silence
2002, ,
, Trance/Hard Trance
André Visior
Don't Go
2002, ,
, Hard Trance/Ambient
Various
Danceclub 2002
2002, 2x CD, ,
, Trance/Euro House/Hard Trance
André Visior
Speed Up (Luvstruck 2002)
2002
Trance Allstars
Go (The Clubmixes)
2002, CD, ,
, Trance
Talla 2XLC
Can You Feel The Silence
2003
Talla 2XLC
Innocence
2003, ,
, Hard Trance
APPEARANCES +
Various
Exit Trance Presents Aerodynamic (Extended Versions)
2015, 24xFile, WAV, Exit Tunes
Various
Tunnel Trance Force Vol. 44
2008, 2xCD, Comp, Mixed, Tunnel Records, ,
, Trance/Hardstyle/Hard Trance
Brooklyn Bounce
Crazy / The Theme Of (Progressive Attack) Recall '08
2008
Various
Fantasy Dance Hits Vol 9
2007, 2xCD, Comp, YAWA Recordings, ,
, House/Electro/Euro House/Trance/Hands Up
Various
Exit Trance Presents Aerodynamic
2007, CD, Comp, Mixed, Exit Tunes, 
,
, Trance/Hard Trance
Brooklyn Bounce Vs. 666 / Brooklyn Bounce
Progressive D.E.V.I.L. / The Theme (Of Progressive Attack) Recall '08
2007
Various
Velfarre Complete Best 1994 - 2006
2006, 6xCD, Mixed, Avex Trax, ,
, Latin/Eurobeat/Hard House/Techno/Euro House/Trance/Europop/Hard Trance/Eurodance
Various
Axwax Records Presents Greatest Hits
2006, 14xFile, MP3, Comp, 320, Axwax Records, ,
, Trance/Hard Trance
Various
Quake Trance Best 8
2005, 2xCD, Comp, Mixed, Quake Records
Various
Quake White Vol. 30
2005, 12", W/Lbl, Sti, Quake Records
Various
Quake Trance Best 8
2005, 43xFile, AAC, Quake Records, ,
, Trance/Hard Trance/Euro House/Hands Up
Remotion
Broken Wings
2005
Various
Tunnel Trance Force Vol. 29
2004, 2xCD, Comp, Mixed, Tunnel Records
Various
Kontor - Top Of The Clubs Volume 22
2004, 2xCD, Comp, Mixed, Kontor Records, ,
, Trance/Euro House/House
Various
Bump 14
2004, 2xCD, Comp, Mixed, RPM Dance, 
,
, House/Trance/Euro House/Hard Trance/Electro/Electro House/Hands Up/Dance-pop
Various
Tekno! 31
2004, 2xCD, Comp, Popron Traxx, Universal, 
,
, House/Euro House/Trance
Various
Pure Trance The Box Set
2004, 4xCD, Comp, Water Music Dance
Axxis
Untouched
2004, ,
, Trance
Talla 2XLC Feat. Ely*
The Air That I Breathe (Remixes)
2004
André Visior
Angels
2004
Various
Dream Dance 33
2004, ,
, Trance
Various
Underground Trance Volume 1
2003, 2xCD, Comp, Traffic Trading,
Trance
DJ Shog & Special D.
Technics DJ Set Volume Ten
2003, 2xCD, Comp, Copy Prot., Mixed, Warner Strategic Marketing, ,
, Trance/Euro House
Various
DJ Networx Vol. 16
2003, 2xCD, Comp, Mixed, Tunnel Records, Tunnel Records, ,
, Trance/Hardstyle/Hard Trance
Various
Tekno! 27
2003, 2xCD, Comp, Popron Traxx, Universal, 
,
, House/Euro House/Trance/Eurodance
Various
Pure Trance 2
2003, CD, Comp, Water Music Dance
Spy The Ghost
Partytime
2003, CD, Comp, Promo, Smplr, Magneoton
Various
Bump 12
2003, 2xCD, Comp, Mixed, RPM Dance, ,
, House/Progressive House/Trance/Progressive Trance
Various
Shakers
2003, CD, Comp, Mixed, RPM Dance
Final Excess
Rock Da Place
2003, CD, ,
, Trance/Hard Trance
Lichtenfels
Sounds Like A Melody
2003, CD, ,
, Trance
Hush Feat. Andrea Britton
Sisters Of The Sun
2003
RMB Feat. Talla 2 XLC*
Spring
2003
Ayu*
Connected (Talla 2XLC Remixes)
2003
Spy The Ghost
Partytime
2003, CD, 
,
, Trance/Euro House
Various
ID&T Hardtrance 2
2002, 2xCD, Mixed, ID&T, 
,
, Hard Trance/Trance
Various
Trancemaster 3004
2002, 2xCD, Comp, Vision Soundcarriers, ,
, Trance
DJ Greenhead
Evolution 12
2002, CD, Comp, Mixed, Energetic Records, Warner Music, ,
, Trance/Hard Trance
Antraxx
See My Paradise
2002, 12", Axwax Records, ,
, Trance
Various
Kontor - Top Of The Clubs Volume 16
2002, 2xCD, Comp, Mixed, Kontor Records, ,
, Trance/Euro House
Talla 2XLC
Techno Club Vol.17 - His Own Challenge
2002, 2xCD, Comp, Copy Prot., Mixed, Dance Division, Dance Division, ,
, Trance/Hard Trance/Progressive Trance
Various
House Nation 2003
2002, CD, Comp, Hed Arzi Music, WAX (9), 
,
, House/Trance/Hard Trance/Progressive Trance
Various
Tunnel Trance Force Vol. 23
2002, ,
, Trance/Euro House
Unit 5
Feel The Stars
2002, ,
, Trance/Euro House
DJ Shog & Essential DJ Team*
Technics DJ Set Volume Six
2002, 2x CD, ,
, Trance/Hard Trance
DJ Frost
Poison
2002
André Visior
Don't Go
2002
Axel Coon
Close To You
2002
André Visior
Speed Up (Luvstruck 2002)
2002, ,
, Trance
Various
Tunnel Goes Ibiza 2002
2002, ,
, Trance/Hard Trance
Vintage Beat
Sometimes Remixes
2002, ,
, Trance
Various
Speed & Power Style Best
2008, 2xCD, Comp, Mixed, Avex Trax, ,
, Eurobeat/Trance/House/Garage House/Soul/Disco/Dancehall/Reggae/Euro House
Various
Dark Trance Vs. Neo-Goth Volume 1
2005, 2x CD Textured Digipak, 
,
, Synth-pop/Progressive Trance/Trance/Hard Trance/Acid
Talla 2XLC
Techno Club Next
2004, 2xCD, Comp, Mixed, Polystar (3), Universal, ,
, Trance/Hard Trance/Progressive Trance
Talla 2XLC
Techno Club Classix - Chapter One
2004, 2xCD, Comp, Mixed, Universal, Urban, ,
, Trance/Hard Trance
Various
Speed & Power Style
2004, 2xCD, Comp, Copy Prot., Mixed, Avex Trax, ,
, Trance/Euro House/House/Eurobeat
DuMonde
Kalt (Mixes)
2004
Various
Mega Trance (18 Hard-Hitting Melodic Club Cutz)
2004, ,
, Trance/Progressive Trance
Various
eXcellent @ Beach 2004
2004, 2x CD, ,
, Progressive House/House/Progressive Trance/Trance
Yoji Biomehanika
The Future Of Hard Dance 001
2003, CD, Comp, Copy Prot., Mixed, Superb Trax, ,
, Hardstyle/Hard Trance
DJ Madwave
Shiva 2003
2003, CD, Mixed, TBA, ,
, Trance
Various
Trance Maniaxx Version 2.0
2003, CD, Comp, Copy Prot. + CD, Comp, Copy Prot., Mixed, Club Tools, Edel Records, ,
, Trance/Hands Up/House
DJ Mind-X
Motion! 2003
2003, CD, Comp, Mixed, Energetic Records, Warner Music, ,
, Trance
Various
Sunshine Live Vol. 6
2003, CD, Comp + CD, Comp, Mixed, Toptrax Recordings, ,
, Trance/Hard Trance/House
Heller & Enkie
Trance Nation 16
2003, CD + CD, Mixed + Comp, Edel Records, ,
, Trance/Euro House
Various
Axe Presents Pulse Beats
2003, CD, Comp, Enh, Edel
Various
Multi Maxi
2003, 2xCD, Comp, Dos Or Die Recordings, ,
, Hard House/Euro House/Hard Trance/Trance
Various
Debaile Summer Edition
2003, 2xCD, Comp + DVD-V, Debaile Muxxic, WEA, 
,
, Euro House
DJ Dave
Stand By Me (The Remixes)
2003
Lichtenfels
Sounds Like A Melody
2003
Hush Feat. Andrea Britton
Sisters Of The Sun
2003
RMB Feat. Talla 2XLC
Spring
2003
Various
Dream Dance 28
2003, 2x CD, ,
, Trance/Euro House
George Acosta
Miami
2003, 2x CD, ,
, Trance/Hard Trance
Ayumi Hamasaki
RMX Works From Cyber Trance Presents Ayu Trance 3
2003
E Nomine Mit Ralf Moeller
Schwarze Sonne
2003, CD, ,
, Trance/Hard Trance
Ayu*
Connected
2003
Mind-X*
Energy 02 - Ibiza
2002, CD, Comp, Mixed, Energetic Records, Energetic Records, Warner Music Switzerland, Warner Music Switzerland, ,
, Trance
Unit5*
Feel The Stars
2002, ,
, Trance
Dito
Sky
2002, ,
, Trance
Talla 2XLC
Can You Feel The Silence
2002, ,
, Trance/Hard Trance
Axel Coon
Close To You (Remixes)
2002, ,
, Hard Trance
Vintage Beat
Sometimes
2002
Various
Nautilus - Trance Compilation 2004
2004, CD, Comp, Mixed, Sunshine Records (53)
DJ Centaury Vs. DJ Chilli
PartyGuide.ch Trance Compilation Vol. 1
2004, CD, Comp, Mixed, WPM Records, ,
, Trance
Various
Strictly Trance Vol. 01
2004, 2xCD, Comp, More Music And Media
Various
Trance:Empire Vol. 1
2004, 2xCD, Comp, More Music And Media, ,
, Trance/Euro House
Various
Baggersee Hits
2004, 2xCD, Comp, Edel Media & Entertainment GmBH, ,
, Europop/Dance-pop
Various
Trance Voices Volume Seven
2003, 2xCD, Comp, Copy Prot., Polystar (3), ,
, Trance/Euro House
Various
Club Rotation Volume 22
2003, 2xCD, Comp, Warner Strategic Marketing, ,
, Trance/Euro House/Hard Trance/House/Hard House
Various
Trance - The Vocal Session 4
2003, 2xCD, Comp, ZYX Music, ,
, Trance
Various
Maximum Dance 07/03
2003, CD, Comp, Mr Music
Various
Dance Max 2003/1
2003, 2xCD, Comp, Edel, ,
, House/Trance
Various
Club Explosion Vol.1
2003, 2xCD, Comp, More Music And Media, ,
, Trance
Various
EuroDance / The Best Party Trance + Dance From Europe
2003, 2xCD, Comp, Warner Strategic Marketing, ,
, Euro House/Eurodance/Hard Trance/Hands Up/House/Trance
Various
Club Tools 02.03
2003, CD, Comp, Copy Prot. + CD, Comp, Copy Prot., Mixed, Edel Records, ,
, House/Euro House/Progressive Trance
Various
Techno Marathon Vol. 5
2002, 2xCD, Mixed, Dance Network
DJ RiB
Dark Trance Vs. Neo-Goth Volume 1
2005, 2x CD, 
,
, Synth-pop/Progressive Trance/Trance/Hard Trance/Acid
Various
Hard Trance Volume 2
2004, CD-ROM, Comp, Mixed, Unofficial, MP3, Навигатор, ,
, Trance/Hard Trance/Acid/Techno
Various
Dream Dance 33
2004, ,
, Trance
Various
Dream Dance Vol. 34
2003, Cass, Comp, Unofficial, NRJ Energy (2), ,
, House/Trance/Hard Trance/Progressive Trance/Euro House/Eurodance
Various
Cyberia XI: Quadrumatrix
2003, 3xCDr, Comp, Mixed, Unofficial + CDr, Comp, Enh, M, 8007L36 R3C0RD5, ,
, Progressive Trance/Progressive House/Tech Trance/Breaks/Euro House/Eurodance
Various
Dream Dance 28
2003, 2x CD, ,
, Trance/Euro House
Various
Дискотека Арлекина 68 Выпуск
2003, ,
, Euro House/Trance/Progressive Trance
Various
Tunnel Trance Force Vol. 23
2002, ,
, Trance/Euro House
DJ Shog / Essential DJ Team*
Technics DJ Set Volume Six
2002
Various
Tunnel Goes Ibiza 2002
2002