We describe the results of a radio continuum survey of the central 4 ^ { \circ } \times 1 ^ { \circ } with the 100 m Green Bank Telescope ( GBT ) at wavelengths of 3.5 , 6 , 20 , and 90 cm .
The 3.5 and 6 cm surveys are the most sensitive and highest resolution single dish surveys made of the central degrees of our Galaxy .
We present catalogs of compact and extended sources in the central four degrees of our Galaxy , including detailed spectral index studies of all sources .
The analysis covers star-forming regions such as Sgr B and Sgr C where we find evidence of a mixture of thermal and nonthermal emission .
The analysis quantifies the relative contribution of thermal and nonthermal processes to the radio continuum flux density toward the GC region .
In the central 4 ^ { \circ } \times 1 ^ { \circ } of the GC , the thermal and nonthermal flux fractions for all compact and diffuse sources are 28 % /72 % at 3.5 cm and 19 % /81 % at 6 cm .
The total flux densities from these sources are 783 \pm 52 Jy and 1063 \pm 93 Jy at 3.5 and 6 cm , respectively , excluding the contribution of Galactic synchrotron emission .