only very high end gaming laptop has upgradeable GPU.
Alienware 17 / 18.
Illegear RS / RX (clevo barebone)
MSI GT.
For a start, go to:
www.illegear.com
Illegear RS-15, i7-4700MQ + AMD 8970M + (1920x1080)@RM5799[3.1kg][Onkyo, SoundBlaster X-FI MB3], 8GB, 500GB(7200rpm), Multi-Color Programmable Backlit Keyboard, FreeDOS, [CPU Options: i5-4200M - i7-4930MX] [GPU Options: AMD 8970M, Nvidia GTX765M, Nvidia GTX770M, Nvidia GTX780M, Nvidia Quadro K1000M, Nvidia Quadro K3000M]
Illegear RS-17, i7-4700MQ + AMD 8970M + (1920x1080)@RM6099[3.9kg][Onkyo, SoundBlaster X-FI MB3], 8GB, 500GB(7200rpm), Multi-Color Programmable Backlit Keyboard, FreeDOS, [CPU Options: i5-4200M - i7-4930MX] [GPU Options: AMD 8970M, Nvidia GTX765M, Nvidia GTX770M, Nvidia GTX780M, Nvidia Quadro K1000M, Nvidia Quadro K3000M]
Illegear RX-17, i7-4700MQ + AMD 8970M + (1920x1080)@RM6999[3.9kg][Onkyo, SoundBlaster X-FI MB3], 8GB, 500GB(7200rpm), Multi-Color Programmable Backlit Keyboard, FreeDOS, [CPU Options: i5-4200M - i7-4930MX] [GPU Options: Single/Dual AMD 8970M CrossfireX, Single/Dual Nvidia GTX765M SLI, Single/Dual Nvidia GTX780M SLI]
Customise it and see it totally blow your budget

I'm planning for the Gt70-20c sir...
So is that a reliable laptop? And can i upgrade its hdd sdd gpu later? Maybe after gtx770 is already outdated?