Exhibit 99.2

September 25, 2007

Dear Shareholders:

Previously you received our letter dated August 21, 2007 announcing the Board's
approval of a merger with IBT Bancorp, Inc., of Mt. Pleasant, Michigan. The
letter indicating the terms of the agreement included GCFC shareholders
receiving shares of IBT equal to the shares now owned in GCFC at an exchange
rate of $44.00 per share. Further it was intended that the agreement be a tax
free exchange of stock. In addition, IBT offered the holders of GCFC common
stock a two year put option following the merger at a price of $44.00 per share.

After performing additional research into the IRS tax laws and accounting
standards, IBT raised concerns that the put option would prevent the exchange of
stock from being tax free.

To be eligible for a tax free exchange of shares, the Agreement and Plan of
Merger has been amended. The consideration of $44.00 per shares remains. The new
agreement will exchange each one of your GCFC shares for $14.70 cash plus .6659
of a share of IBT Common Stock. The stock portion of the exchange is intended to
be a tax free exchange under this arrangement while the cash portion will be
taxable. You will not, however, be entitled to a two year put of $44.00 per
share for the IBT shares as described in the earlier letter. The IBT shares will
be subject to the same market risks as your GCFC shares.

The GCFC Board of Directors has approved this amendment to the original
agreement at a meeting on September 24, 2007 and recommends a positive vote.

We will be sending you an Offering Circular describing the merger transaction in
detail, a Notice of Special Meeting of GCFC Shareholders for the purpose of
voting on this transaction and a proxy statement for voting once regulatory
approvals have been obtained.

If you have any questions concerning this merger transaction or this amendment,
please call Ted Kortes at 616-754-9004 or Jae Evans at 616-754-5100. Thank you.

Sincerely,


/s/ James M. Mullendore                 /s/ Ted Kortes
James M. Mullendore, Jr.                Ted Kortes
Chairman                                President & CEO