If you want to set Google.com as your homepage and not Google.pk, Google.in, Google.kr or Google.co.uk, go to your browser’s settings (type chrome://settings on your address bar) then click the “Show Home Button” under “Appearance”.
Once done, click “Change” then a small overlay window will appear. Select “Open this page” then type “https://www.google.com/ncr” instead of just google.com or the likes. The “ncr” in the link stands for “No Country Redirect” so if you include this on the URL, Google won’t geolocate your homepage based on your country IP address.
Alternatively, if you don’t want to use Google as your homepage, you can just type “google.com/ncr” on your address bar. If you do this, you will be automatically taken to Google’s regular page and you can immediately start your search.
On other web browsers (ex. Firefox, Internet Explorer, etc.)
The same principle applies to other web browsers. Just replace or update the link for your browser’s homepage with Google’s “No Country Redirect” link and that’s it.
Now, keep in mind that one of the main reasons why Google redirects you to its country-specific page is to provide you with the most relevant results for your search queries.
If you want to go for specific country type http://www.google.co.uk/ncr = google.co.uk