Johny.: Maybe you have an antivirus or firewall that is blocking the Galaxy Client? Try to disable it temporarily and check if Galaxy works for you then. If not, please send logs and a bug report to
http://mantis.gog.com (more info in
this post)
ryuzaki93lr: i try but no it's not that and it's not only galaxy but the website too sometime i cant enter the website for long time :/
Please post a screenshot when the website is not available for you! We can determine then where the problem with connection is exactly.
Or write what message that you see.
Also, test if
https://www.gog.com/forum is unavailable too in that moment.
For example attached screenshot shows internet connectivity error (in Polish :P ).