Make GET calls directly to geoip.php to get GeoIP info like this:
PHP v5.6.40
Seattle, Washington, United States

Passing a format string can give you different output:
http://geoip.gotmls.net/geoip.php?format=Your IP: geo(ip)<br />IP Location: geo(city), geo(region_name), geo(country_name) would give you:
Your IP: 3.15.211.19<br />IP Location: Seattle, Washington, United States

or just include this JavaScript on your page:
<script src="http://geoip.gotmls.net/geoip.js"></script>
and get this output: