Realizing that GPUPerfStudio is meant for windows, I decided to try it out under wine. It works great! Use winetricks to get the .NET runtime 4.0.
Well, I wouldn't be posting if I didn't have a question. I can connect the server to GPUTest (tess_x16) and run the client on the same machine under wine, and everything appears to work fine except the Frame Profiler window, which causes the program being monitored to segfault (GPUTest).
I don't expect the devs to prioritize this bug report, but here's what I'm seeing...
Linux 3.12.6-gentoo x86_64 AMD A10-6800K APU with Radeon(tm) HD Graphics AuthenticAMD GNU/Linux
$ fglrxinfo
display: : 0 screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: AMD Radeon HD 8670D
OpenGL version string: 4.4.12874 Compatibility Profile Context 13.152
Mesa version: 10.0.4
X.org version: 1.14.5
X.Org ANSI C Emulation: 0.4
X.Org Video Driver: 14.1
X.Org XInput driver : 19.1
X.Org Server Extension : 7.0
fglrxdrm compiled for 1.4.99.906, module version = 14.10.2
GpuTest Linux 0.7.0 (x64)
GPUPerfStudio server 3.0.68 (x64)
GPUPerfStudio client 3.0.64.0 (x86 32-bit)
Wine 1.7.0
