I have an unlocked Galaxy Nexus (a gift) that works on Tmobile, via a SIM card, but does not have a sim card slot that fits the Verizon network. Has anyone solved this issue?
nope, they work on different systems completely.
your nexus -GSM network only (t-mobile, at&t)
verizon nexus - CDMA (verizon only, but Sprint uses CDMA as well)
I have an unlocked Galaxy Nexus (a gift) that works on Tmobile, via a SIM card, but does not have a sim card slot that fits the Verizon network. Has anyone solved this issue?
It will not work. It is a GSM phone, Verizon is a CDMA carrier.
Very surprised you want to do this. 99% of people are trying to do the exact opposite. Why would you want to go to Big Red? Stick with T-Mobile or AT&T (or an MVNO) and save yourself some money. The i9250 (GSM) Galaxy Nexus has bands for any GSM network in the US. Take a look at all of your offerings. You won't want to go with Verizon.
Thanks for your responses. I have gifted this phone to another and am exploring their options. Your feedback has been very constructive, but the decision is not mine to make.