A few suggestions:

1) Don't comment out lines.  Pi-Star does not like commented lines and will likely not parse the file correctly with any present.

2) Try appending a (not previously used) two digit suffix to your DMRID.  Like 318310210, 318310220, and so on.

3) Replace passw0rd with a generated secure one after completing the registration process on the tgif website.

4) You seem to be missing a parameter that I have in mine (Local=62035).  My stanzas for each network use a unique number in that line (62033, 62034, 62035 and so on).

Here's my stanza for TGIF for comparison.  Caveat: I am using Phil, VE3RD's excellently modified DMRGateway-4, so my rewrite rules are a bit different):

[DMR Network 4]
Enabled=1
Name=TGIF
Id=311164434
Address=tgif.network
Port=62031
Local=62035
TGRewrite0=2,1,2,1,9999999
TGRewrite1=2,14000001,2,1,999999
PCRewrite0=2,9990,2,9990,1
PCRewrite1=2,14009990,2,9990,1
SrcRewrite0=2,9990,2,WB3IHY,1
Password=(16 digit secure password redacted)
Location=1
Debug=0

Hope some/all of that is of some help.

73,
Joe, WB3IHY