This polite phrase is used to thank someone for contacting you. "ご連絡" (go-renraku) is the honorific form of "連絡" (renraku, contact). It's very common in business communications, emails, and customer service interactions when acknowledging an inquiry or message from another person.

相手からの連絡に対し、丁寧に感謝を伝える言葉です。ビジネスでよく使われます。