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donq posting below is how my settings on GPIO SOPC Builder, ie, input port only. The problem is when compiling the file and check Pin-Out everything related to GPIO_0 is bidirectional. How can I solve this problem. Thank you.
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By carefully reading all the way to paragraph 2 of my previous reply.
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...you must connect the output pins from the output GPIO to
output pin symbols on the Quartus page...
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This is the main block diagram / symbolic design page, where you edit the BDF file.
If you continue to have problems at this level, I might suggest that you do one of the tutorials...
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