Robogels suck alone. Dose them with a shot of a syrup preparation (alcohol, PEG, or propylene glycol); it will speed absorption by improving the solubility (and speed of dissolving and diffusing the caps).
Alternatively, consume half bottle/syrup immediately, and then rest between +30 and +60 minutes. This should feel much closer to your initial pill experience.
For maximium nauseau control you should spread your dose over as much time as possible within 45 minutes. You should throw a dose of syrup in at least 3 times (instead of some gels?)
The nausea comes from additives (i think syrup is softer) and also just from the rush of neurotransmitters filling up. Slower comeups often mean less nausea.