There is no 1-wire peripheral on the TM4C123GH6PZ device like there is on the TM4C129XKCZAD device, but it can be emulated with a UART. You would need to tie the UnTx and UnRx pins together and then configure the UnTx pin as a GPIO input when the slave is responding. I suggest you put a current limiting resistor on the UnTx pin in case you accidentally have it still driving high while the slave is trying to drive low. The resistor should be large enough to protect the output buffer of the TM4C but small enough to guarantee good Vil levels when used with the 1-wire pullup resistor.
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