Bunch of problems.

First, I cant open console, throws me a memory error.
Second, the Event Horizons of Stargates appears black. I can only see it from a certian angle.

Spec: ATI Radeon Xpress 200 series graphics (shit i know, cant afford a newer one)
2gb ram

Need anything else just ask.

Try deleting any unneeded addons. Most of errors for gmod happen because of bad addons.

Ive used gmod with no addons, still problems. Same problems. Reinstalled 3 times. Same problems. Format HD, same problems.

about the console problem: Start Garrysmod with the -console parameter.