"As all of you know, this particular region of New Zealand will be a big beneficiary of TPP."
The Wellington embassy and Auckland consulate were "open for business", he said..
When asked by Hawke's Bay Today why he was meeting with exporters to his country when other countries' ambassadors focused on importers, Mr Gilbert said that building relationships was a precursor to business.
"When business happens it has a tendency to go in both directions, but what comes first is relationships," he said.
"The rest of it will take care of itself."
A wine lover, Mr Gilbert visited with his wife Nancy and said they would return to Hawke's Bay "without question".
He played for the Chicago White Sox in 1985 but his career was cut short by a knee injury.
He became a merchant banker and was an early supporter of Barack Obama's successful campaign for US President.
Mr Obama nominated Mr Gilbert for his ambassadorial role, which he took up early this year.