OK,
So, P25Gateway is not too chatty.
Do you have the entry for 10888 in both private and public host file?

Change P25Gateway.ini to this:

[General]
Callsign=K5TRA
RptAddress=127.0.0.1
# RptAddress=192.168.0.188
RptPort=32010
LocalPort=42020
Announcements=1
Daemon=0

[Id Lookup]
Name=/var/lib/mmdvm/DMRIds.dat
Time=24

[Log]
FilePath=/var/log/mmdvm
FileRoot=P25Gateway

[Network]
# Port=41000
Port=42010
HostsFile1=./P25Hosts.txt <------------------ Do these files exist in this location?
HostsFile2=./Private_P25Hosts.txt <------------------ Do these files exist in this location?
ReloadTime=60
# RptAddress=192.168.0.188 <---------------------- Remove this
# ParrotAddress=192.168.0.188
# RptAddress=127.0.0.1
ParrotAddress=127.0.0.1
ParrotPort=42011
Startup=10888
# Startup=10100
InactivityTimeout=0
# InactivityTimeout=10
Debug=0