How to remove my forks?

I'm really trying hard at the moment to service the headset in my 2008 gt avalanche 1.0, but I am really struggling to get the forks out. Tried wacking the steerer with a rubber mallet and squirting it with gt-85 to see if that would loosen it up but no luck. Please help!!
Thanks, ripped abs
Thanks, ripped abs

road: carrera tdf ltd 2012
xc: gt avalance 1.0 2008
love cycling
xc: gt avalance 1.0 2008
love cycling

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Parktools
xc: gt avalance 1.0 2008
love cycling
retired 9.6kg Carrera Kraken
The Carrera Hardtail combined thread - come on all you Carrera's!
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read
viewtopic.php?f=40073&t=12689155
remove the wedge .
Parktools :?:SheldonBrown
xc: gt avalance 1.0 2008
love cycling
Im scared that i will break the bike!!!
xc: gt avalance 1.0 2008
love cycling
There is no secret ingredient - Kung Fu Panda
London Calling on Facebook
Parktools
I was scared too but it turned out alright.
xc: gt avalance 1.0 2008
love cycling
xc: gt avalance 1.0 2008
love cycling
I had a bucket under the BB and propped the front end up. No workstand
Giant Trance
Radon ZR 27.5 Race
Btwin Alur700
Merida CX500
xc: gt avalance 1.0 2008
love cycling
HIT IT!
retired 9.6kg Carrera Kraken
The Carrera Hardtail combined thread - come on all you Carrera's!
The Sons Scott Genius RC20 build