how i can get the IP Address to my arduino uno ??
Which IP address? The Arduino UNO doesn't know how to handle any network traffic, it needs additional hardware (p.e. Ethernet shield). What hardware do you have (link to it)? Usually the IP address gets into the Arduino by including it into a sketch which you then upload to the UNO.
I connected the Arduino Uno with Fastrax UP501 GPS Shield V1.2 and WiFi esp8266. from which one of these i can get IP Address ??
from which one of these i can get IP Address ??
From the one that HAS an IP address. Hint: It is not the Arduino and it is not the GPS.