The arrestee was identified as Abdul Gani, 46, son of Siddik Ahmed, said a press release.
BGB men caught the man after raiding a special service bus of Palki Paribahan at 8:10 am.
The gold bars were concealed inside his belt, and valued at Tk 65 lakh.
A case has been filed over the matter.
Also read: BGB seizes goods, drugs worth Tk 64.9 cr in Oct