Hi,
I understand that you kept VLAN 1 untagged on all ports that connect the switches, correct? And you manually tagged your voice VLAN on each of the interconnect ports on each switch.
Then you activated gvrp in the global contex. The switched should learn the "vedio" VLAN dynamically and tag it on the ports. That should be pretty much it.
What is the second VLAN the switches learned?
Please be sure that your native VLANs match, as on this VLANs the BPDUs are sent.
For more information please read the following guide:
https://h20566.www2.hpe.com/hpsc/doc/public/display?sp4ts.oid=5179395&docLocale=en_US&docId=emr_na-c04943197
Then you connected two PCs in VLAN 1 on the same switch, but they couldn't ping each other? Did you check that the client's firewall is disabled?
P.S.
Punctuation would not hurt ;-)