The U.S. never used a G mint mark and the only Indian head cents that did carry a mint mark were made by the San Francisco Mint in 1908 and 1909.
The 1882 Indian Head cent is a common coin. Most circulated coins have values of $3.00-$6.00
Assuming you mean Indian Head cent 1887 retail value is $6.00
what is the value of a Indian head penny in excellent condition
The Indian Head cent was not minted until 1859.
No Indian Head cent was ever struck in silver.
Check that date again. The Indian head cent wasn't first minted until 1859.
1882 cents look like any other Indian head cent from the period 1864-1909. I can't point you to a picture of an 1882, but the link shows an 1881 with exactly the same design.
A 1898 Indian head cent made by the US mint has a face value of a .01 USD or 1 cent.
There's no such coin. Wheat cents were made from 1909 to 1958. If your coin has an Indian head design, it's an Indian head cent, not a wheat cent.
The first year issue for a Indian Head cent was 1859
Average value of a 1893 Indian head cent is $1.00-$3.00 for circulated coins.
A 1905 Indian Head cent in average circulated condition has a retail value of $1.00$3.00