RFIC Layout regarding to the bypass capacitor to ground

[SDRookie]

I'm doing the layout for my RFIC. Since the IC doesn't have ground plane, it is difficult to get a good ground. I saw lots of people used bypass capacitor, but I'm confused about where they put the other terminal of capacitor in the layout. For example, the cascode gate need a bypass capacitor to ground to avoid unstable. one of the terminal is connect to the gate very close, what about the other terminal? I only have ground pad which could be far from the gate of the cascode MOS. if there is still some distance between the cap and the ground pad, I can't eliminate the inductance at the gate. how should I solve this problem?

Thanks.